Quote from: Macr0 on April 20, 2017, 06:11:28 PM

Quote from: sempron on April 20, 2017, 04:46:20 PM

do I really have to delete and resync everytime I update to a new wallet version? Cause it usually takes me overnight to resync the wallet.

Which version do you run? 4.0.1?

Check this old post from devs:

Quote from: SUM2dev on April 06, 2017, 01:08:47 PM

We just released NavCoin v4.0.1.

This new version fixes a critical block validation issue which led to network incongruences between nodes on the last days.

EVERY 4.0 user should update to this version immediately.

Downloads available at:

http://navcoin.org/downloads/

INSTRUCTIONS TO UPDATE

1. Backup your wallet.
2. Close NavCoin Core if it is open.
3. Remove the folders 'chainstate' and 'blocks' from:
WINDOWS -> C:/Users//AppData/Roaming/NavCoin4/
MAC -> ~/Library/Application Support/NavCoin2
LINUX -> ~/.NavCoin2/
4. Download new version, install and run.

Thanks!

https://bitcointalk.org/index.php?topic=679791.msg18529779#msg18529779

currently at 4.0.1.0 planning to update to the latest version. That's exactly what I did and it resync right from the start.